Mathematical computer and register.



E. ATTAWY.

MATHBMATIGAL (BOMPUTBR AND REGISTER.

uPLIoATIloN FILED JULY 24, 1911.

1,016,245. l Patented Feb.6,1912.

SHEIITS-BHEET 1.

lllll *j/ff Z9 49 l lllllllll lllll l'llll E. ATTAWAY.

MATHEMATIGAL COMPUTER AND REGISTER.

APPLIGATION FILED JULY 111111 1.

1,016,245'. Tat-,amd Feb.v6,`1912.

l 2 SHEETS-SHEET 2.

ELISHiA ATTAWAY- ,'OF MORLBOW, LOUISIAYNA.

MAATHEMATICAL COMPUTER AND REGISTER.

To all 'whom tmay concern.'

- Be it known that I, ELISHA ATTAWAY, a citizen of the United States,'residing at Morrow, in the parish of St. Landry and State of Louisiana,have invented a newv and useful' Mathematical Computer and Register,l ofwhich the following is a speci-- ication.

The present invention relates to improvements in mathematical computersand registers, andthe primary object of the invention is the provisionof a ycomputing or registering device especially applicable for use inkeeping scale registers, or in fact for quickly computing in additionand subtrac tion, to obtain the gross and net weight in weighing loadedcars and wagons, or in fact for obtaining the sums in addition or theminuends in substraction for any pur-v pose whatsoever.-

A further object'of the invention is the provision of a rectangularreceptacle provided with av series of longitudinally disposed and s aceddivided or scaled bars, combined Wit a series of slidably ymounted barsor poises, each one of which is provided with a scale with properregistering markings thereon, combined with a slidably mounted auxiliarypoise disposed upon the' main sliding poises and so mounted as to haveits double arrow head or point reglster with the scale upon thestationary or main sliding bar to co-act with a pointer carried at theeXtreme left end of the slidable bar, to indicate the sum or minundparticularly .pointed `to by the respective pointers. 1

With the foregoing and other objects in Iview which will appear as t-hedescription' proceeds, the invention resides in the arrangement andcombination oi parts and in the details of construction hereinaterdescribed and claimed, it being understood that changes in the preciseembodiment of invention herein disclosed can be made within the scope ofwhat is claimed without departing from the spirit of the inven tion.

' In the drawings-Figure 1 is a top plan view of the complete apparatus,the main poises being in various positions, to demonstrate the use ofthis invention. Fig. 2 is a perspective view of one of the main poisesremoved. Fig. 3 is a cross section taken on Specicationof LettersPatent. Application filed July 24 1911. Serial No. 640,184.

line 3 3 (if Fig. 1. I Fig. i is a perspective view of one of theauxiliary poises. Fig.

5- is a cross section therethrough.

Referring to the drawings, the numeral 1 designates the metal receptacleprovided with four upstanding portlons forming a rim to receive thetransverse detachable end strip 2 which 'projects above the rims ot thereceptacle and holds the respective Patented, Feb. 6,1912.

members within the receptacle, the longivtudinally disposed strip 2being/ mountedwithin the receptacle at the upper edge as clearly shownin Figs. 1 and 3.

Disposed rigidly within the receptacle and parallel to each other, arethe stationary bars, -3 4, 5, '6' and.7, whose opposed faces areinclined, sol as to provide dovetailed slots therebetween for themovable reception of the respective main sliding poises 3', 4', 5, 6and, the same being inoperable relation to the respective stationaryscale bars, and alll of said bars and poises being provided with scalesas shown divided intov equal parts, to represent pounds, decimals ofpounds, dollars and cents, tons and decimals of tons, or in fact anyscale of weights and measures that may be desired.

The main poises are so disposed within 'the spaces bet-Ween thestationary bars that the spaces 8 are provided, the

which will presently appeai".

Each one of the mam poises or bars, such as 3 as clearly shown in Fig.2, are propurpose of vided at their left hand ends with the plates lDisposed upon the inner face of the mainv poise such as 3', and oppositethe plate 9 is a plate 13, having the triangular shaped plate 14 formedat the inner end thereof and terminating in the angular flange orguiding arm 15, which is adapted to abut thebase 12 of its respectiveco-acting sta-- tionary bar 3 and thereby provide a means to retain themovable poise within the space between the stationary bars of thedevice. Mounted atthe other end of the sliding poise is a plate 16having the u standing finger engaging plate or flange 1%, so that thesaid poise may be Vslid within the space between the main or stationarybars so that the pointer 11 may beistopped at the desired scale.

In order to retain the body` and ends of 1, plate 21 which is a apted toengage the base 12 ofthe stationary bar similar to the flange 15, andthereby Ietain the sliding poises in relative parallel relation to thestationaryl batrs. Y

Disposed to slide within the spaces -8 and be locked therein are theauxiliary poises 22, each of one of which consists of the block 23dove-tail in cross section, and having mounted thereon the metal plate24 havingthe upper short portion 25 resting upon the reduced upper edgeof the block 23 and -provided with the upstanding nger engag- .ingfiange 26, and with the double pointed dove-tailed portion 27, havingvthe upper tare rate pointer 28 and the lower gross rate pointer 29.

4In order to properly demonstrate the use of the present:apparatus, thebar 3 and its sliding poise 3 will be illustrated as in. operation. Forinstance as shown in Fig. 1, the pointer 11 ind'cates 20 cent-s whilethe auxiliary poise indicator point indicates the gross 50 cents, whilethe tare rate pointer 28 indicates 30, so that the minuend wouldregister 20 from 50- leaving 30, orfor addition 20 and 30 equals 50. Itwill thus be seen that all three of the indications are yindicated atonce; and that b v the manipulation of the main sliding vpoise 3, sothat its pointer 11 will indicate the amount it is desired to add to thetare rate carried by the poise 3', or, if desired, the gross ratecarried. by the stationary bar 3.

The bar 4 and its sliding poise 4 is shown out of operation.

In the position of the bar 5 and its sliding poise 5', the pointer 11indicates 2,000, while the auxiliary poise indicates at the tare pointer28 2,500 which if added to the 2,000 pointed by the pointer 11 shows asindicated by the gross pointer 29, the sum of 4,500. Or if desired tosubtract, the 2,000 indicated by the pointer 11 subtracted from'the/1,500 indicated by the pointer 29, will equal the tare asdemonstrated by the tare pointer 28 of 2,500.

As illustrated by the stationary bar 6 and its sliding poise 6, thepointer 11 indicates 200, for instance dollars, while the tare pointer28 indicates 800 dollars, the

gross pointer 29 indicating 1,000 dollars, so

that the 200 indicated by the pointer 11 added to the 800 pointed'by thetare pointery 28 will .equal the amount pointed to by the pointer 29 or1,000-dollars. To subtract indicatethe minuend200, while to subtract the200 from the 1,000 the pointer 28 will indicate the minuend/.of 800.

As indicated by the stationary bar l7 and its movable poise 7', thepointerltindicates .30 while the pointer 28 of thel auxiliary poiseindicates 50, which if added to the 30 will indicate as pointed by thepointer 29, the sum of 80. The subtraction that is 30 from 80 willindicate as shown Hby the pointer 28 the minuend of 50.

From this description it will be noted that the manipulation of thisdevice is very simple and that a person of ordinary intelligence cankeepa register or record of `the weights, and should'it be desired tocontinue an account or register, it is simplynecessary to manipulate themovable poises with relation to the stationary bars and the auxil iarypoises, adding and subtracting as desired any'of three numbers, givingat an instant, the sum or the minuend, as clearly set forth in the'examples heretofore given.

What is claimed is: l. In a lmathematical computer and register, havinga receptacle, two stationary bars disposed longitudinally therewithinand providing a space dove-tailed in cross section, the lower lof saidbars being provided upon its outer face with a graduated scale, a bar oflesser width than the dovetailed space and of a shorter length than thefirst twobars slidably mounted' within the space therebetween, guidingmeans carried at the respective ends thereof to retain said sliding barwithin the space, a pointer carried by one end thereof projecting abovethe scale of the lower stationary bar, said sliding barv being providedwith equal graduations to the lower bar. and a sliding poise disposedbetween the sliding bar and lower stationary bar, and provided withoppositely disposed pointers adapted to simultaneously indicate thergraduations upon the respective scales of the lower stationary bar andthe sliding bar.

2. In a mathematical computer and register, a receptacle, two stationarybars disposed longitudinally therewithin and providing a spacedove-tailed in cross section, the lower of said bars being provided uponits outer face with a graduated scale, a bar of lesser width than thedove-tailed space and of a shorter length than the first two r barsslidably mounted within the space therebetween, a plate at each end ofsaid sliding bar for engaging the lower stationary bar to retain thesliding bar Within vthe dove-tailed space, said sliding bar beingnarrower than said space and providing a dove-tailed in cross sectionspace parallel with the sliding bar and between said plates,

va pointer carried at one end of the sliding bar toproject above thescale of the lower the reduced dove-tailed space between stationary bar,said sliding bar being provided with similar graduations to the lower ihul', and a sliding poise dove-tailed in Cross section mounted forsliding movement in! sliding bar and lower stationary bar, said slidingpoise having at one end oppositely disposed pointers to simultaneouslyindicate graduations upon the respective scales ofi the ture in thepresence the lower bar.

In testimony that I claim the foregoing as my own, 1 have hereto axed mysignaof two witnesses.

ELSHA ATTAWAY.

Stationary bul' und the sliding 10 Witnesses:

W. W. HALEY, S. L. GIPsoN.

